Emotional tears are a uniquely human behavior. Research suggests they evolved not for eye health but as a powerful social signal that strengthens bonds and elicits care.

In many cultures, especially for men, crying is considered to be undignified and infantile behavior, except in certain specific circumstances such as mourning the loss of a close friend or relative.

Humans appear to be the only species clearly proven to shed tears specifically because of emotions. Elephants, primates, and dogs show behaviors and biological responses that come closest to human ...